github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/contrib/init/sysvinit-debian/docker (about)

     1  #!/bin/sh
     2  set -e
     3  
     4  ### BEGIN INIT INFO
     5  # Provides:           docker
     6  # Required-Start:     $syslog $remote_fs
     7  # Required-Stop:      $syslog $remote_fs
     8  # Should-Start:       cgroupfs-mount cgroup-lite
     9  # Should-Stop:        cgroupfs-mount cgroup-lite
    10  # Default-Start:      2 3 4 5
    11  # Default-Stop:       0 1 6
    12  # Short-Description:  Create lightweight, portable, self-sufficient containers.
    13  # Description:
    14  #  Docker is an open-source project to easily create lightweight, portable,
    15  #  self-sufficient containers from any application. The same container that a
    16  #  developer builds and tests on a laptop can run at scale, in production, on
    17  #  VMs, bare metal, OpenStack clusters, public clouds and more.
    18  ### END INIT INFO
    19  
    20  export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
    21  
    22  BASE=docker
    23  
    24  # modify these in /etc/default/$BASE (/etc/default/docker)
    25  DOCKERD=/usr/bin/dockerd
    26  # This is the pid file managed by docker itself
    27  DOCKER_PIDFILE=/var/run/$BASE.pid
    28  # This is the pid file created/managed by start-stop-daemon
    29  DOCKER_SSD_PIDFILE=/var/run/$BASE-ssd.pid
    30  DOCKER_LOGFILE=/var/log/$BASE.log
    31  DOCKER_OPTS=
    32  DOCKER_DESC="Docker"
    33  
    34  # Get lsb functions
    35  . /lib/lsb/init-functions
    36  
    37  if [ -f /etc/default/$BASE ]; then
    38  	. /etc/default/$BASE
    39  fi
    40  
    41  # Check docker is present
    42  if [ ! -x $DOCKERD ]; then
    43  	log_failure_msg "$DOCKERD not present or not executable"
    44  	exit 1
    45  fi
    46  
    47  check_init() {
    48  	# see also init_is_upstart in /lib/lsb/init-functions (which isn't available in Ubuntu 12.04, or we'd use it directly)
    49  	if [ -x /sbin/initctl ] && /sbin/initctl version 2> /dev/null | grep -q upstart; then
    50  		log_failure_msg "$DOCKER_DESC is managed via upstart, try using service $BASE $1"
    51  		exit 1
    52  	fi
    53  }
    54  
    55  fail_unless_root() {
    56  	if [ "$(id -u)" != '0' ]; then
    57  		log_failure_msg "$DOCKER_DESC must be run as root"
    58  		exit 1
    59  	fi
    60  }
    61  
    62  cgroupfs_mount() {
    63  	# see also https://github.com/tianon/cgroupfs-mount/blob/master/cgroupfs-mount
    64  	if grep -v '^#' /etc/fstab | grep -q cgroup \
    65  		|| [ ! -e /proc/cgroups ] \
    66  		|| [ ! -d /sys/fs/cgroup ]; then
    67  		return
    68  	fi
    69  	if ! mountpoint -q /sys/fs/cgroup; then
    70  		mount -t tmpfs -o uid=0,gid=0,mode=0755 cgroup /sys/fs/cgroup
    71  	fi
    72  	(
    73  		cd /sys/fs/cgroup
    74  		for sys in $(awk '!/^#/ { if ($4 == 1) print $1 }' /proc/cgroups); do
    75  			mkdir -p $sys
    76  			if ! mountpoint -q $sys; then
    77  				if ! mount -n -t cgroup -o $sys cgroup $sys; then
    78  					rmdir $sys || true
    79  				fi
    80  			fi
    81  		done
    82  	)
    83  }
    84  
    85  case "$1" in
    86  	start)
    87  		check_init
    88  
    89  		fail_unless_root
    90  
    91  		cgroupfs_mount
    92  
    93  		touch "$DOCKER_LOGFILE"
    94  		chgrp docker "$DOCKER_LOGFILE"
    95  
    96  		ulimit -n 1048576
    97  
    98  		# Having non-zero limits causes performance problems due to accounting overhead
    99  		# in the kernel. We recommend using cgroups to do container-local accounting.
   100  		if [ "$BASH" ]; then
   101  			ulimit -u unlimited
   102  		else
   103  			ulimit -p unlimited
   104  		fi
   105  
   106  		log_begin_msg "Starting $DOCKER_DESC: $BASE"
   107  		start-stop-daemon --start --background \
   108  			--no-close \
   109  			--exec "$DOCKERD" \
   110  			--pidfile "$DOCKER_SSD_PIDFILE" \
   111  			--make-pidfile \
   112  			-- \
   113  			-p "$DOCKER_PIDFILE" \
   114  			$DOCKER_OPTS \
   115  			>> "$DOCKER_LOGFILE" 2>&1
   116  		log_end_msg $?
   117  		;;
   118  
   119  	stop)
   120  		check_init
   121  		fail_unless_root
   122  		if [ -f "$DOCKER_SSD_PIDFILE" ]; then
   123  			log_begin_msg "Stopping $DOCKER_DESC: $BASE"
   124  			start-stop-daemon --stop --pidfile "$DOCKER_SSD_PIDFILE" --retry 10
   125  			log_end_msg $?
   126  		else
   127  			log_warning_msg "Docker already stopped - file $DOCKER_SSD_PIDFILE not found."
   128  		fi
   129  		;;
   130  
   131  	restart)
   132  		check_init
   133  		fail_unless_root
   134  		docker_pid=$(cat "$DOCKER_SSD_PIDFILE" 2> /dev/null)
   135  		[ -n "$docker_pid" ] \
   136  			&& ps -p $docker_pid > /dev/null 2>&1 \
   137  			&& $0 stop
   138  		$0 start
   139  		;;
   140  
   141  	force-reload)
   142  		check_init
   143  		fail_unless_root
   144  		$0 restart
   145  		;;
   146  
   147  	status)
   148  		check_init
   149  		status_of_proc -p "$DOCKER_SSD_PIDFILE" "$DOCKERD" "$DOCKER_DESC"
   150  		;;
   151  
   152  	*)
   153  		echo "Usage: service docker {start|stop|restart|status}"
   154  		exit 1
   155  		;;
   156  esac